Isinglass is a firewall setup script designed to protect dial-up users. It protects a user's system against security holes in programs user may not even know are running. Most users can run it "out of the box" without any configuration required. It will automatically detect network interfaces and IP addresses. isinglass-hzd is an unofficial bugfix/2.2 support release.
The Linux dshield.org Perl Client package consists of an updated Linux dshield.org Perl client for submitting kernel firewall filter log entries to dshield.org. It has been written to implement tighter coding and better processing than the Perl client currently available on dshield.org.
pks-commands.php3 allows your Web server to search and add PGP/GPG keys from the public keys out there. It takes the TCP 11371 port connection and does it all on the web server. It is good in environments where the client machines are unable to get to arbitrary TCP ports (such as behind tightened firewalls).
ipfmeta is used to simplify the maintenance of an IPfilter ruleset. It does this through the use of 'objects'. A matching object gets replaced by its values at runtime. ipfmeta is specifically geared towards IPfilter, but may also be used for other firewall packages (iptables). It is line-oriented: if an object has multiple values, the line with the object is duplicated and substituted for each value. It is also recursive: an object may have another object as a value.
SLIS is a TCP/IP gateway for schools. It provides advanced functions to students and teachers, such as a filtering proxy/cache, email addresses, access control, Web replication, Web mirroring, an intranet Web server with PHP and PostgreSQL, user management, DHCP, remote monitoring of a global set of SLIS servers, live update, etc. All of this is provided by an easy-to-use Web interface. All of the project is in French, but work is in progress to make it international.